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[nostalgia] Move much of the OpenGL code to glutils

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This commit is contained in:
Gary Talent
2021-10-29 00:57:59 -05:00
parent 51f3c01c4e
commit 45d79e99e8
6 changed files with 99 additions and 66 deletions
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src/nostalgia/core/userland/gfx.cpp
+1 -7
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@@ -6,19 +6,13 @@
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <ox/claw/claw.hpp>
#include <nostalgia/core/gfx.hpp>
#include <nostalgia/core/media.hpp>
#include "gfx.hpp"
namespace nostalgia::core {
template<typename T>
static ox::Result<T> readObj(Context *ctx, const ox::FileAddress &file) noexcept {
oxRequire(buff, ctx->rom->read(file));
return ox::readClaw<T>(buff);
}
ox::Error initConsole(Context *ctx) noexcept {
constexpr auto TilesheetAddr = "/TileSheets/Charset.ng";
constexpr auto PaletteAddr = "/Palettes/Charset.npal";
src/nostalgia/core/userland/gfx_opengl.cpp
+30 -56
View File
@@ -33,15 +33,14 @@ constexpr auto BgVertexVboRowLength = 4;
constexpr auto BgVertexVboLength = BgVertexVboRows * BgVertexVboRowLength;
constexpr auto BgVertexEboLength = 6;
struct Background {
glutils::GLVertexArray vao;
glutils::GLBuffer vbo;
glutils::GLBuffer ebo;
glutils::GLTexture tex;
struct Background: public glutils::BufferSet {
bool enabled = false;
bool updated = false;
std::array<float, TileCount * BgVertexVboLength> bgVertices = {};
std::array<GLuint, TileCount * BgVertexEboLength> bgElements = {};
inline Background() noexcept {
vertices.resize(TileCount * BgVertexVboLength);
elements.resize(TileCount * BgVertexEboLength);
}
};
struct GlImplData {
@@ -54,11 +53,11 @@ struct GlImplData {
constexpr const GLchar *bgvshad = R"(
{}
in vec2 vTexCoord;
in vec2 position;
in vec2 vPosition;
out vec2 fTexCoord;
uniform float vTileHeight;
void main() {
gl_Position = vec4(position, 0.0, 1.0);
gl_Position = vec4(vPosition, 0.0, 1.0);
fTexCoord = vTexCoord * vec2(1, vTileHeight);
})";
@@ -77,7 +76,8 @@ static constexpr auto bgVertexRow(unsigned x, unsigned y) noexcept {
return y * TileRows + x;
}
static void setTileBufferObject(Context *ctx, unsigned vi, float x, float y, int textureRow, float *vbo, GLuint *ebo) {
static void
setTileBufferObject(Context *ctx, unsigned vi, float x, float y, int textureRow, float *vbo, GLuint *ebo) noexcept {
// don't worry, this memcpy gets optimized to something much more ideal
const auto [sw, sh] = getScreenSize(ctx);
constexpr float ymod = 2.0f / 20.0f;
@@ -100,59 +100,35 @@ static void setTileBufferObject(Context *ctx, unsigned vi, float x, float y, int
memcpy(ebo, elms, sizeof(elms));
}
static void sendVbo(const Background &bg) noexcept {
// vbo
glBindBuffer(GL_ARRAY_BUFFER, bg.vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(bg.bgVertices), &bg.bgVertices, GL_DYNAMIC_DRAW);
}
static void sendEbo(const Background &bg) noexcept {
// ebo
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bg.ebo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(bg.bgElements), &bg.bgElements, GL_STATIC_DRAW);
}
static void initBackgroundBufferObjects(Context *ctx, Background *bg) noexcept {
static void initBackgroundBufferObjects(Context *ctx, glutils::BufferSet *bg) noexcept {
for (auto x = 0u; x < TileColumns; ++x) {
for (auto y = 0u; y < TileRows; ++y) {
const auto i = bgVertexRow(x, y);
auto vbo = &bg->bgVertices[i * BgVertexVboLength];
auto ebo = &bg->bgElements[i * BgVertexEboLength];
auto vbo = &bg->vertices[i * BgVertexVboLength];
auto ebo = &bg->elements[i * BgVertexEboLength];
setTileBufferObject(ctx, i * BgVertexVboRows, static_cast<float>(x), static_cast<float>(y), 0, vbo, ebo);
}
}
}
static glutils::GLVertexArray genVertexArrayObject() noexcept {
GLuint vao = 0;
glGenVertexArrays(1, &vao);
return glutils::GLVertexArray(vao);
}
static glutils::GLBuffer genBuffer() noexcept {
GLuint buff = 0;
glGenBuffers(1, &buff);
return glutils::GLBuffer(buff);
}
static void initBackgroundBufferset(Context *ctx, GLuint shader, Background *bg) noexcept {
static void initBackgroundBufferset(Context *ctx, GLuint shader, glutils::BufferSet *bg) noexcept {
// vao
bg->vao = genVertexArrayObject();
bg->vao = glutils::generateVertexArrayObject();
glBindVertexArray(bg->vao);
// vbo & ebo
bg->vbo = genBuffer();
bg->ebo = genBuffer();
bg->vbo = glutils::generateBuffer();
bg->ebo = glutils::generateBuffer();
initBackgroundBufferObjects(ctx, bg);
sendVbo(*bg);
sendEbo(*bg);
glutils::sendVbo(*bg);
glutils::sendEbo(*bg);
// vbo layout
auto posAttr = static_cast<GLuint>(glGetAttribLocation(shader, "position"));
auto posAttr = static_cast<GLuint>(glGetAttribLocation(shader, "vPosition"));
glEnableVertexAttribArray(posAttr);
glVertexAttribPointer(posAttr, 2, GL_FLOAT, GL_FALSE, BgVertexVboRowLength * sizeof(float), nullptr);
auto texCoordAttr = static_cast<GLuint>(glGetAttribLocation(shader, "vTexCoord"));
glEnableVertexAttribArray(texCoordAttr);
glVertexAttribPointer(texCoordAttr, 2, GL_FLOAT, GL_FALSE, BgVertexVboRowLength * sizeof(float),
ox::bit_cast<void*>(2 * sizeof(float)));
std::bit_cast<void*>(2 * sizeof(float)));
}
static glutils::GLTexture loadTexture(GLsizei w, GLsizei h, void *pixels) noexcept {
@@ -192,10 +168,10 @@ static void drawBackground(Background *bg) noexcept {
glBindVertexArray(bg->vao);
if (bg->updated) {
bg->updated = false;
renderer::sendVbo(*bg);
glutils::sendVbo(*bg);
}
glBindTexture(GL_TEXTURE_2D, bg->tex);
glDrawElements(GL_TRIANGLES, static_cast<GLsizei>(bg->bgElements.size()), GL_UNSIGNED_INT, nullptr);
glDrawElements(GL_TRIANGLES, static_cast<GLsizei>(bg->elements.size()), GL_UNSIGNED_INT, nullptr);
}
}
@@ -210,16 +186,15 @@ static void drawBackgrounds(GlImplData *id) noexcept {
}
ox::Error init(Context *ctx) noexcept {
constexpr auto GlslVersion = "#version 150";
const auto id = new GlImplData;
ctx->setRendererData(id);
const auto vshad = ox::sfmt(bgvshad, GlslVersion);
const auto fshad = ox::sfmt(bgfshad, GlslVersion);
const auto vshad = ox::sfmt(bgvshad, glutils::GlslVersion);
const auto fshad = ox::sfmt(bgfshad, glutils::GlslVersion);
oxReturnError(glutils::buildShaderProgram(vshad.c_str(), fshad.c_str()).moveTo(&id->bgShader));
for (auto &bg : id->backgrounds) {
initBackgroundBufferset(ctx, id->bgShader, &bg);
}
ImGui_ImplOpenGL3_Init(GlslVersion);
ImGui_ImplOpenGL3_Init(glutils::GlslVersion);
return OxError(0);
}
@@ -280,8 +255,6 @@ void draw(Context *ctx) noexcept {
glClear(GL_COLOR_BUFFER_BIT);
// render
renderer::drawBackgrounds(id);
//bool showDemo = true;
//ImGui::ShowDemoWindow(&showDemo);
for (const auto cd : ctx->drawers) {
cd->draw(ctx);
}
@@ -318,9 +291,10 @@ void setTile(Context *ctx, int layer, int column, int row, uint8_t tile) noexcep
const auto x = static_cast<unsigned>(column);
const auto i = renderer::bgVertexRow(x, y);
auto &bg = id->backgrounds[z];
auto vbo = &bg.bgVertices[i * renderer::BgVertexVboLength];
auto ebo = &bg.bgElements[i * renderer::BgVertexEboLength];
renderer::setTileBufferObject(ctx, i * renderer::BgVertexVboRows, static_cast<float>(x), static_cast<float>(y), tile, vbo, ebo);
auto vbo = &bg.vertices[i * renderer::BgVertexVboLength];
auto ebo = &bg.elements[i * renderer::BgVertexEboLength];
renderer::setTileBufferObject(ctx, i * renderer::BgVertexVboRows,
static_cast<float>(x), static_cast<float>(y), tile, vbo, ebo);
bg.updated = true;
}