void TinyGLRenderer::drawTexturedRect2D(const Common::Rect &screenRect, const Common::Rect &textureRect,
Texture *texture, float transparency, bool additiveBlending) {
const float sLeft = screenRect.left;
const float sTop = screenRect.top;
const float sWidth = screenRect.width();
const float sHeight = screenRect.height();
if (transparency >= 0.0) {
if (additiveBlending) {
tglBlendFunc(TGL_SRC_ALPHA, TGL_ONE);
} else {
tglBlendFunc(TGL_SRC_ALPHA, TGL_ONE_MINUS_SRC_ALPHA);
}
tglEnable(TGL_BLEND);
} else {
transparency = 1.0;
}
tglEnable(TGL_TEXTURE_2D);
tglDepthMask(TGL_FALSE);
Graphics::BlitTransform transform(sLeft, sTop);
transform.sourceRectangle(textureRect.left, textureRect.top, sWidth, sHeight);
transform.tint(transparency);
tglBlit(((TinyGLTexture *)texture)->getBlitTexture(), transform);
tglDisable(TGL_BLEND);
tglDepthMask(TGL_TRUE);
}
void TinyGLRenderer::drawTexturedRect3D(const Math::Vector3d &topLeft, const Math::Vector3d &bottomLeft,
const Math::Vector3d &topRight, const Math::Vector3d &bottomRight, Texture *texture) {
TinyGLTexture *glTexture = static_cast<TinyGLTexture *>(texture);
const float w = glTexture->width / (float)glTexture->internalWidth;
const float h = glTexture->height / (float)glTexture->internalHeight;
tglBlendFunc(TGL_SRC_ALPHA, TGL_ONE_MINUS_SRC_ALPHA);
tglEnable(TGL_BLEND);
tglDepthMask(TGL_FALSE);
tglBindTexture(TGL_TEXTURE_2D, glTexture->id);
tglBegin(TGL_TRIANGLE_STRIP);
tglTexCoord2f(0, 0);
tglVertex3f(-topLeft.x(), topLeft.y(), topLeft.z());
tglTexCoord2f(0, h);
tglVertex3f(-bottomLeft.x(), bottomLeft.y(), bottomLeft.z());
tglTexCoord2f(w, 0);
tglVertex3f(-topRight.x(), topRight.y(), topRight.z());
tglTexCoord2f(w, h);
tglVertex3f(-bottomRight.x(), bottomRight.y(), bottomRight.z());
tglEnd();
tglDisable(TGL_BLEND);
tglDepthMask(TGL_TRUE);
}
void TinyGLRenderer::drawRect2D(const Common::Rect &rect, uint32 color) {
uint8 a, r, g, b;
Graphics::colorToARGB< Graphics::ColorMasks<8888> >(color, a, r, g, b);
tglDisable(TGL_TEXTURE_2D);
tglColor4f(r / 255.0, g / 255.0, b / 255.0, a / 255.0);
if (a != 255) {
tglEnable(TGL_BLEND);
tglBlendFunc(TGL_SRC_ALPHA, TGL_ONE_MINUS_SRC_ALPHA);
}
for (int x = rect.left; x < rect.right; x++) {
for (int y = rect.top; y < rect.bottom; y++) {
_fb->writePixel(y * kOriginalWidth + x, a, r, g, b);
}
}
tglDisable(TGL_BLEND);
}
void TinyGLRenderer::drawRect2D(const Common::Rect &rect, uint32 color) {
uint8 a, r, g, b;
Graphics::colorToARGB< Graphics::ColorMasks<8888> >(color, a, r, g, b);
tglDisable(TGL_TEXTURE_2D);
tglColor4f(r / 255.0, g / 255.0, b / 255.0, a / 255.0);
if (a != 255) {
tglEnable(TGL_BLEND);
tglBlendFunc(TGL_SRC_ALPHA, TGL_ONE_MINUS_SRC_ALPHA);
}
tglBegin(TGL_TRIANGLE_STRIP);
tglVertex3f(rect.left, rect.bottom, 0.0f);
tglVertex3f(rect.right, rect.bottom, 0.0f);
tglVertex3f(rect.left, rect.top, 0.0f);
tglVertex3f(rect.right, rect.top, 0.0f);
tglEnd();
tglDisable(TGL_BLEND);
}
void TinyGLRenderer::draw2DText(const Common::String &text, const Common::Point &position) {
TinyGLTexture *glFont = static_cast<TinyGLTexture *>(_font);
// The font only has uppercase letters
Common::String textToDraw = text;
textToDraw.toUppercase();
tglEnable(TGL_BLEND);
tglBlendFunc(TGL_SRC_ALPHA, TGL_ONE_MINUS_SRC_ALPHA);
tglEnable(TGL_TEXTURE_2D);
tglDepthMask(TGL_FALSE);
tglColor3f(1.0f, 1.0f, 1.0f);
tglBindTexture(TGL_TEXTURE_2D, glFont->id);
int x = position.x;
int y = position.y;
for (uint i = 0; i < textToDraw.size(); i++) {
Common::Rect textureRect = getFontCharacterRect(textToDraw[i]);
int w = textureRect.width();
int h = textureRect.height();
Graphics::BlitTransform transform(x, y);
transform.sourceRectangle(textureRect.left, textureRect.top, w, h);
transform.flip(true, false);
Graphics::tglBlit(glFont->getBlitTexture(), transform);
x += textureRect.width() - 3;
}
tglDisable(TGL_TEXTURE_2D);
tglDisable(TGL_BLEND);
tglDepthMask(TGL_TRUE);
}
void glInit(void *zbuffer1, int textureSize) {
FrameBuffer *zbuffer = (FrameBuffer *)zbuffer1;
GLContext *c;
GLViewport *v;
if ((textureSize & (textureSize - 1)))
error("glInit: texture size not power of two: %d", textureSize);
if (textureSize <= 1 || textureSize > 4096)
error("glInit: texture size not allowed: %d", textureSize);
c = new GLContext();
gl_ctx = c;
c->fb = zbuffer;
c->fb->_textureSize = c->_textureSize = textureSize;
c->fb->_textureSizeMask = (textureSize - 1) << ZB_POINT_ST_FRAC_BITS;
// allocate GLVertex array
c->vertex_max = POLYGON_MAX_VERTEX;
c->vertex = (GLVertex *)gl_malloc(POLYGON_MAX_VERTEX * sizeof(GLVertex));
// viewport
v = &c->viewport;
v->xmin = 0;
v->ymin = 0;
v->xsize = zbuffer->xsize;
v->ysize = zbuffer->ysize;
v->updated = 1;
// shared state
initSharedState(c);
// lists
c->exec_flag = 1;
c->compile_flag = 0;
c->print_flag = 0;
c->in_begin = 0;
// lights
for (int i = 0; i < T_MAX_LIGHTS; i++) {
GLLight *l = &c->lights[i];
l->ambient = Vector4(0, 0, 0, 1);
if (i == 0) {
l->diffuse = Vector4(1, 1, 1, 1);
l->specular = Vector4(1, 1, 1, 1);
l->has_specular = true;
} else {
l->diffuse = Vector4(0, 0, 0, 1);
l->specular = Vector4(0, 0, 0, 1);
l->has_specular = false;
}
l->position = Vector4(0, 0, 1, 0);
l->spot_direction = Vector3(0, 0, -1);
l->spot_exponent = 0;
l->spot_cutoff = 180;
l->attenuation[0] = 1;
l->attenuation[1] = 0;
l->attenuation[2] = 0;
l->cos_spot_cutoff = -1.0f;
l->norm_spot_direction = Vector3(0, 0, -1);
l->norm_position = Vector3(0, 0, 1);
l->enabled = 0;
l->next = NULL;
l->prev = NULL;
}
c->first_light = NULL;
c->ambient_light_model = Vector4(0.2f, 0.2f, 0.2f, 1);
c->local_light_model = 0;
c->lighting_enabled = 0;
c->light_model_two_side = 0;
// default materials */
for (int i = 0; i < 2; i++) {
GLMaterial *m = &c->materials[i];
m->emission = Vector4(0, 0, 0, 1);
m->ambient = Vector4(0.2f, 0.2f, 0.2f, 1);
m->diffuse = Vector4(0.8f, 0.8f, 0.8f, 1);
m->specular = Vector4(0, 0, 0, 1);
m->has_specular = false;
m->shininess = 0;
}
c->current_color_material_mode = TGL_FRONT_AND_BACK;
c->current_color_material_type = TGL_AMBIENT_AND_DIFFUSE;
c->color_material_enabled = 0;
// textures
glInitTextures(c);
// default state
c->current_color = Vector4(1.0f, 1.0f, 1.0f, 1.0f);
c->longcurrent_color[0] = 65535;
c->longcurrent_color[1] = 65535;
c->longcurrent_color[2] = 65535;
c->longcurrent_color[3] = 65535;
c->current_normal = Vector4(1.0f, 0.0f, 0.0f, 0.0f);
c->current_edge_flag = 1;
c->current_tex_coord = Vector4(0.0f, 0.0f, 0.0f, 1.0f);
c->polygon_mode_front = TGL_FILL;
c->polygon_mode_back = TGL_FILL;
c->current_front_face = 0; // 0 = GL_CCW 1 = GL_CW
c->current_cull_face = TGL_BACK;
c->current_shade_model = TGL_SMOOTH;
c->cull_face_enabled = 0;
// clear
c->clear_color = Vector4(0.0f, 0.0f, 0.0f, 0.0f);
c->clear_depth = 0;
// selection
c->render_mode = TGL_RENDER;
c->select_buffer = NULL;
c->name_stack_size = 0;
// blending
c->fb->enableBlending(false);
// alpha test
c->fb->enableAlphaTest(false);
// matrix
c->matrix_mode = 0;
c->matrix_stack_depth_max[0] = MAX_MODELVIEW_STACK_DEPTH;
c->matrix_stack_depth_max[1] = MAX_PROJECTION_STACK_DEPTH;
c->matrix_stack_depth_max[2] = MAX_TEXTURE_STACK_DEPTH;
for (int i = 0; i < 3; i++) {
c->matrix_stack[i] = (Matrix4 *)gl_zalloc(c->matrix_stack_depth_max[i] * sizeof(Matrix4));
c->matrix_stack_ptr[i] = c->matrix_stack[i];
}
tglMatrixMode(TGL_PROJECTION);
tglLoadIdentity();
tglMatrixMode(TGL_TEXTURE);
tglLoadIdentity();
tglMatrixMode(TGL_MODELVIEW);
tglLoadIdentity();
tglBlendFunc(TGL_SRC_ALPHA, TGL_ONE_MINUS_SRC_ALPHA);
tglAlphaFunc(TGL_ALWAYS, 0.f);
tglDepthFunc(TGL_LESS);
c->matrix_model_projection_updated = 1;
// opengl 1.1 arrays
c->client_states = 0;
// opengl 1.1 polygon offset
c->offset_states = 0;
// shadow mode
c->shadow_mode = 0;
// clear the resize callback function pointer
c->gl_resize_viewport = NULL;
// specular buffer
c->specbuf_first = NULL;
c->specbuf_used_counter = 0;
c->specbuf_num_buffers = 0;
// depth test
c->depth_test = 0;
c->color_mask = (1 << 24) | (1 << 16) | (1 << 8) | (1 << 0);
const int kDrawCallMemory = 5 * 1024 * 1024;
c->_currentAllocatorIndex = 0;
c->_drawCallAllocator[0].initialize(kDrawCallMemory);
c->_drawCallAllocator[1].initialize(kDrawCallMemory);
c->_enableDirtyRectangles = false;
Graphics::Internal::tglBlitSetScissorRect(0, 0, c->fb->xsize, c->fb->ysize);
}